Valve-reseating device.



`TOHN G. HOLMES AND GEORGE PUFFER, OF WAUPUN, WISCONSIN.

VALVE-RESEATING DEVICE.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed November 15,1906. Serial No. 343.630.

To all whom it may concern:

Be it known that we, JOHN G. HOLMES and GEORGE PUFFER, citizens of theUnited States, residing at /Vaupun, in the county of Fond du Lac andState of Wisconsin, have invented a new and useful Valve-ReseatingDevice, of which the following is a specification.

This invention relates to a device for reseating globe and gate valveswithout the necessity of disconnecting the valves from the pipe system,Iand it relates more particularly toa device for truing worn, irregular,or defective valve seats from time to time, until the stock at the seatbecomes so cut away that further truing is impracticable, whereupon theentire seat is bored out and the opening topped for receiving a bushingadapted to form a new valve seat.

The invention has for one of its objects to improve and simplify theconstruction and operation of devices of this character so as tofacilitate the truing and renewal of valve seats in a simple, reliableand eiiicient manner.

A further object of the invention is to provide a reseating tool whichis of simple construction and composed of fewparts comparatively chea tomanufacture, and which is adapted to e used for reseating valves ofdifferent sizes, and which is designed to employ dierent forms ofcutters necessary for truing and renewing the valve seats,

With these objects in view, and others, as will appear as the nature ofthe invention is better understood, the invention comprises the variousnovel features of construction and arrangement of parts, which will bemore fully described hereinafter and set forth with particularity in theclaims appended hereto.

In the accompanying drawing, which illustrates one of the embodimentslof the invention, Figure 1 is a semi-longitudinal sectionand elevationof the device shown in the operation of truing a valve seat of a globevalve. Fig. 2 is a fragmentary elevation of the device in the opera-tionof boring out an old valve seat for the reception of a bushing, thevalve being shown as of the gate type. Fig. 3 is a perspective view ofthe lower end of the spindle and the tap for threading the bored outseat so as to receive the seat bushing. Fig. 4 is a perspective view ofthe seat bushing.

Corresponding parts in the several figures are indicated throughout bysimilar characters of reference.

Referring to the drawing, 1 designates the spindle of the device whichhas a working fit in the tubular body 2 in which the spindle is mountedto simultaneously rotate and move longitudinally. The spindle 1 is ofthe same cross section throughout its length and provided with a collar3 adjacent its upper end. The top extremity of the spindle is formedinto a non-circular head 4 for the reception of a brace, wrench, orequivalent means, for rotating the spindle. The lower end of the spindleis reduced to form a shoulder 5 and is provided with a transversepassage 6 of rectangular cross section for receiving the truing too'l orcutter 7, as shown in Fig. 1, or the boring cutter 8, as shown in Fig.2. The cutters are held in place by a binding screw 9 which is threadedin the tapped 'opening 10 extending inwardly from the bottom end of thespindle to the passage 6, On the reduced portion 11, the tap 12 isadapted to fit, and the upper end of the tap is held against theshoulder 5 by the binding screw 13 engaging at its inner end in thesocket 14 on the said reduced portion 11. By this arrangement, cuttersand taps of dierent shapes and sizes may be separately used on a singlespindle, so that the tool can be employed for various sizes and types ofvalves.

The lower end of the body 2 of the device is provided with an externalscrew thread 15 which is adapted to engage in the valve engagingportion, a threaded ring 16 being used in connection with small sizedvalves, as shown in Fig. 1, or in the yoke or bracket 17 for adaptingthe device to large size valves, as shown in Fig. 2. The ring `16 has anexternal thread 18 that is adapted to screw into the bonnet receivingopening of the valve casing, as shown, and several of such rings areprovided so as to fit casings having bonnet receiving openings ofdifferent sizes. The yoke or bracket 17 is provided with' a central taped opening 19 which receives thethrea ed end 15 of the body 2 and onopposite sides of the opening are provided elongated slots 2O throughwhich extend the screw bolts 21 for securely holding the yoke on thevalvel casing At the upper end of the thread 15 the tubular body 2 isformed with an enlargement 22 constituting a shoulder arranged to bearon the supporting ring 16 or yoke 17. The

exterior of the body 2 is provided with a thread 23 which extends fromthe upper end to approximately the middle thereof, and the remainingsurface is milled at 24, so as to -form a grip whereby the body can bescrewed andA unscrewed with relation to the supporting ring or bracket.Engaging the thread 23 is a sleeve 25 which forms la means for feedingthe spindle l. This sleeve is constructed with an internal annularshoulder 26 which abuts the upper surface of the collar l 3, so that thesleeve 25 causes the spindle to move downwardly as'it screws on thetubular body 2. The exterior ofthe feed sleeve 25 at 27 is milled so asto afford a gripping surface whereby the sleeve can be turned by hand.In order to hold the collar 3 in engag-ement' with the shoulder 26 andto prevent the falling of the spindle as well as to permit positivefeeding movements in both directions, a split clamping ring 28 encirclesthe spindle l at a point above the sleeve 25 and is held rigidly on thespindle by means of the screw 29 which draws the end of the ringtogether. By means of the clamping ring and collar 3 engaging onopposite sides of the shouldered portion 26 of the feed sleeve, thespindle is held in place in the body Zand prevented from freelongitudinal movement therein independently of the sleeve. By thisconstruction, the several parts can be readily assembled anddisassembled.

In the operation of truing a valve seat, the parts are assembled andpositioned, as shown in Fig. l, with the cutter 7 secured to 'thespindle. This cutter is provided with a semicircular cutting edge 30 tocorrespond with the normal contour of the valve seat. The cutting edge,however, will be varied lfor different forms of valves. The spindle l isnow rotated by a brace, or other suitableA means, and the depth of thesuccessive cuts is produced by imparting a partial turn to the feedsleeve 25 from time to time as the spindle 1 is continuously rotated. Inpractice, a few turns on the spindle will be sufficient to properlydress the valve seat. After this is done, the device is removed from thevalve casing and the bonnet with the valve is replaced so as to be readyfor regular oper ation. It will thus be seen that a valve can bereseated with comparatively little trouble. When the stock of thediaphragm 3l forming the seat 32 becomes too far cut away by repeatedreseating, the diaphragm is bored out by means of the tool 8 so as toform a cylindrical openin 33, as shown in Fig. 2. The tool is then taren out of the valve casing and After the opening is threaded, thedevice is removed and the seat bushin 34 screwed into the tappedopening. This ushing is preferably made of brass or equivalent materialand is exteriorly threaded to fit the opening 33, and on the interiorare the lugs 35, which form means for engagement with a suitableinstrument whereby the bushing can be screwed in or out. After thebushing has been screwed into the proper position, the device is usedwith the cutter 7 for rounding off the top end of the bushing for thepurpose of forming the seat. This bushing may be cut down from time totime as the seat becomes worn, and when required, a new bushing can besubstituted. These bushings. are of simple construction, and will bemade of different diameters, so as to fit valves of various sizes.

We have described the principle of operation of the invention, togetherwith the apparatus which we now consider to be the best embodimentthereof, but we desire to have it understood that the apparatus shown ismerely illustrative, and that various changes may be made, when desired,as are within the scope ofthe invention.

In combination, a tool carrying spindle in the form of a longcylindrical bar having an operating head and an annular iiange andprovided at its lower end with a reduced portion formingv an annularshoulder, there being a tool receiving slot extending diametrically ofsuch reduced portion and the side and end of the reduced portion havingopenings for the passage of tool binding screws, a cylindrical bodybored for the passage of the spindle and having externally threadedupper and lower ends, a threaded sleeve fitting the upper threads of thebody and having an inturned iange fitting over the flange of thespindle, and a collar clamped on the spindle above said inturned flangewhereby the spindle may be positively fed in both directions.

In testimony that we claim the foregoing as our own, we have heretoaffixed our signatures in the presence of two witnesses.

JOHN G. HOLMES. GEORGE PUFFER.

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